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GIA 4Cs Diamond Blog

GIA 4Cs Diamond Blog

The Mohs scale ranks gem and mineral hardness in a range from 1 (least hard – talc) to 10 (hardest of all – diamond).
Mohs Scale – Gem and Mineral Hardness

Diamonds are known for being one of the hardest substances on earth. A diamond is so hard it ranks as a 10 on the Mohs scale–the highest level of hardness. But what is the Mohs scale? (more…)

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© 2002 – 2024 Gemological Institute of America Inc. GIA is a nonprofit 501(c)(3) organization.
All rights reserved.

Use of this site signifies your agreement to its terms of use.
© 2002 – 2024 Gemological Institute of America Inc.
GIA is a nonprofit 501(c)(3) organization.
All rights reserved.